不同机械方法制备的纤维素纳米纤维（CNFs）提高再生纸的机械性能。

Cellulose nanofibrils (CNFs) produced by different mechanical methods to improve mechanical properties of recycled paper.

机构信息

State Key Laboratory of Pulp and Paper Engineering, Plant Fiber Research Center, South China University of Technology, Guangzhou, CN 510640, China; Guangdong Plant Fiber High-Valued Cleaning Utilization Engineering Technology Research Center, South China University of Technology, Guangzhou, 510640, China.

出版信息

Carbohydr Polym. 2021 Feb 15;254:117474. doi: 10.1016/j.carbpol.2020.117474. Epub 2020 Dec 2.

DOI:10.1016/j.carbpol.2020.117474

PMID:33357928

Abstract

In current study, CNFs produced by different mechanical methods, were used to improve the mechanical properties of recycled paper. The result showed the morphology of CNFs had great impact on reinforced effect and the length of fibrils determined their contribution in recycled paper strength. For different CNFs with similar diameter, the higher aspect ratio resulted in better reinforced effect. The CNFs produced by microfluidic homogenization and suitable PFI milling conditions (RM-CNF1) got best reinforced effect which improved tensile index and burst index by 35.5 % and 49.4 % at 5.0 wt% addition, respectively, due to their high aspect ratio. Although the CNFs produced by ball milling and ultrasonication (BU-CNF2) still had many bundles that were not fibrillated completely, their reinforced effect just below RM-CNF1 due to their special morphology and high retention rate. This work aims to study the influence of CNFs on recycled fibers reinforcement.

摘要

在本研究中，使用了不同机械方法制备的 CNFs 来改善再生纸的机械性能。结果表明，CNFs 的形态对增强效果有很大影响，而纤维的长度决定了它们对再生纸强度的贡献。对于具有相似直径的不同 CNFs，较高的纵横比导致更好的增强效果。通过微流体制备的 CNFs 和合适的 PFI 磨浆条件（RM-CNF1）得到了最好的增强效果，在添加量为 5.0wt%时，分别提高了拉伸指数和耐破指数 35.5%和 49.4%，这是由于其高纵横比。尽管通过球磨和超声处理制备的 CNFs（BU-CNF2）仍有许多未完全纤维化的束，但由于其特殊的形态和高保留率，其增强效果略低于 RM-CNF1。本工作旨在研究 CNFs 对再生纤维增强的影响。